// EnvVarsDlg.cpp : implementation file
//

#include "stdafx.h"
#include "EnvVars.h"
#include "ModifyDlg.h"
#include "PathListBox.h"
#include "RegOperate3.h"
#include "utils.h"
#include "EnvVarsDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEnvVarsDlg dialog

CEnvVarsDlg::CEnvVarsDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CEnvVarsDlg::IDD, pParent), _bHasModified(false)
{
	//{{AFX_DATA_INIT(CEnvVarsDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CEnvVarsDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEnvVarsDlg)
	DDX_Control(pDX, IDC_LIST_SYSPATH, _listCtrlSys);
	DDX_Control(pDX, IDC_LIST_USERPATH, _listCtrlUser);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CEnvVarsDlg, CDialog)
	//{{AFX_MSG_MAP(CEnvVarsDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_LBN_DBLCLK(IDC_LIST_USERPATH, OnDblclkListUserVars)
	ON_LBN_DBLCLK(IDC_LIST_SYSPATH, OnDblclkListSysVars)
	ON_COMMAND(IDM_SYS_ADD_VAL, OnSysAddVal)
	ON_COMMAND(IDM_SYS_MOD_VAL, OnSysModVal)
	ON_COMMAND(IDM_USR_ADD_VAL, OnUsrAddVal)
	ON_COMMAND(IDM_USR_MOD_VAL, OnUsrModVal)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEnvVarsDlg message handlers

BOOL CEnvVarsDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	// TODO: Add extra initialization here
	this->LoadEnvVars();
	this->UpdateUserVarsList();
	this->UpdateSysVarsList();

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CEnvVarsDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CEnvVarsDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CEnvVarsDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CEnvVarsDlg::LoadEnvVars()
{
	UINT const BUF_SIZE = 32767;
	TCHAR sz[BUF_SIZE];
	DWORD dwSize;
	CString strTitle;
	CString strSysEnvKey, strUserEnvKey, strVarName;
	CWinApp * pApp = AfxGetApp();
	strSysEnvKey.LoadString(IDS_SYSENVKEY);
	strUserEnvKey.LoadString(IDS_USERENVKEY);
	strVarName.LoadString(IDS_VARNAME);
	_strSysEnvKey = strSysEnvKey;
	_strUserEnvKey = strUserEnvKey;
	_strVarName = strVarName;
	if ( pApp->m_lpCmdLine[0] != '\0' )
	{
		_strVarName = pApp->m_lpCmdLine;
	}
	this->GetWindowText(strTitle);
	this->SetWindowText( ( _strVarName + (LPCTSTR)strTitle ).c_str() );
	HKEY hSysEnvKey = reg_open_key( _strSysEnvKey.c_str(), FALSE );
	dwSize = BUF_SIZE;
	ZeroMemory( sz, dwSize );
	reg_read_ex( hSysEnvKey, _strVarName.c_str(), (LPBYTE)sz, &_dwRegTypeSysVar, &dwSize );
	_sysVars.clear();
	StrSplit( sz, ";", &_sysVars );
	reg_close_key(hSysEnvKey);

	HKEY hUserEnvKey = reg_open_key( _strUserEnvKey.c_str(), FALSE );
	dwSize = BUF_SIZE;
	ZeroMemory( sz, dwSize );
	reg_read_ex( hUserEnvKey, _strVarName.c_str(), (LPBYTE)sz, &_dwRegTypeUserVar, &dwSize );
	_userVars.clear();
	StrSplit( sz, ";", &_userVars );
	reg_close_key(hUserEnvKey);
}

void CEnvVarsDlg::CommitEnvVars( String const & strEnvKey, String const & strVarName, String const & strValue )
{
	if ( strValue.empty() )
	{
		reg_delete( strEnvKey.c_str(), strVarName.c_str() );
	}
	else
	{
		bool bIsExpand = IsExpandString( strValue.c_str() );
		HKEY hKey = reg_open_key( strEnvKey.c_str(), FALSE );
		reg_write_ex( hKey, strVarName.c_str(), bIsExpand ? REG_EXPAND_SZ : REG_SZ, (BYTE const *)strValue.c_str(), strValue.length() * sizeof(TCHAR) );
		reg_close_key(hKey);
	}
}

void CEnvVarsDlg::UpdateVarsList( CPathListBox & listCtrl, StringArray & arrVars )
{
	int i;
	listCtrl.ResetContent();
	for ( i = 0; i < arrVars.size(); i++ )
	{
		listCtrl.AddString( ExplainEnvVars( arrVars[i].c_str() ).c_str() );
	}
}

void CEnvVarsDlg::OnAddVal( CPathListBox & listCtrl, bool bIsUser, StringArray & arrVars, String const & strEnvKey, String const & strVarName )
{
	CModifyDlg dlg(this);
	dlg.bIsUser = bIsUser;
	dlg.bIsAdd = true;
	if ( dlg.DoModal() == IDOK )
	{
		if ( !dlg.strValue.IsEmpty() )
		{
			arrVars.push_back( (LPCTSTR)dlg.strValue );
			int iSel = arrVars.size() - 1;
			UpdateVarsList( listCtrl, arrVars );
			listCtrl.SetCurSel(iSel);
			this->CommitEnvVars( strEnvKey, strVarName, StrJoin( ";", arrVars ) );
			_bHasModified = true;
		}
	}
}

void CEnvVarsDlg::OnModVal( CPathListBox & listCtrl, bool bIsUser, StringArray & arrVars, String const & strEnvKey, String const & strVarName )
{
	int iSel = listCtrl.GetCurSel();
	if ( iSel == -1 ) return;
	CModifyDlg dlg(this);
	dlg.bIsUser = bIsUser;
	dlg.bIsAdd = false;
	dlg.strValue = arrVars[iSel].c_str();
	if ( dlg.DoModal() == IDOK )
	{
		arrVars[iSel] = dlg.strValue;
		bool bIsEmpty = arrVars[iSel].empty();
		if ( bIsEmpty ) arrVars.erase( arrVars.begin() + iSel );
		UpdateVarsList( listCtrl, arrVars );
		listCtrl.SetCurSel( bIsEmpty ? iSel - 1 : iSel );
		this->CommitEnvVars( strEnvKey, strVarName, StrJoin( ";", arrVars ) );
		_bHasModified = true;
	}
}

void CEnvVarsDlg::UpdateUserVarsList()
{
	UpdateVarsList( _listCtrlUser, _userVars );
}

void CEnvVarsDlg::UpdateSysVarsList()
{
	UpdateVarsList( _listCtrlSys, _sysVars );
}

void CEnvVarsDlg::OnSysAddVal()
{
	this->OnAddVal( _listCtrlSys, false, _sysVars, _strSysEnvKey, _strVarName );
}

void CEnvVarsDlg::OnUsrAddVal()
{
	this->OnAddVal( _listCtrlUser, true, _userVars, _strUserEnvKey, _strVarName );
}

void CEnvVarsDlg::OnSysModVal()
{
	this->OnModVal( _listCtrlSys, false, _sysVars, _strSysEnvKey, _strVarName );
}

void CEnvVarsDlg::OnUsrModVal()
{
	this->OnModVal( _listCtrlUser, true, _userVars, _strUserEnvKey, _strVarName );
}

void CEnvVarsDlg::OnDblclkListUserVars()
{
	this->OnUsrModVal();
}

void CEnvVarsDlg::OnDblclkListSysVars()
{
	this->OnSysModVal();
}

void CEnvVarsDlg::OnOK()
{
	if ( _bHasModified )
	{
		LRESULT lResult;
		lResult = ::SendMessage( HWND_BROADCAST, WM_SETTINGCHANGE, 0, (LPARAM)"Environment" );
	}
	CDialog::OnOK();
}

